[infinispan-dev] optimistic (or not)

[Galder Zamarreño]

I guess the question is: does it make sense to have OL with RC? Seems like this combo ignores concurrent changes, so maybe the isolation level default should change depending on whether OL or PL is used?

On Sep 27, 2012, at 6:09 PM, Mircea Markus <mircea.markus at jboss.com> wrote:

> As we name the transactions optimistic, wouldn't' it make more sense to have WSK functionality enabled by default? (even though that would imply using repeatable_read).
> I mean as a user I kind of expect the tx to fail for optimistic transactions when there's a write skew...
> 
> On 27 Sep 2012, at 16:12, Manik Surtani wrote:
> 
>> WSK only works for repeatable read.  By default we use read committed.
>> 
>> On 27 Sep 2012, at 16:07, Mircea Markus <mircea.markus at jboss.com> wrote:
>> 
>>> Hi,
>>> 
>>> By default our optimistic transactions don't have writeSkewCheck enabled so their behaviour is  counterintuitive for the user. That's because they don't fault the commit in the case of a concurrent change. 
>>> Anyone can remember why these defaults are being used? 
>>> I'd rather have optimistic transactions with WSK enabled by default so that we won't confuse users.  
>>> 
>>> Cheers,
>>> -- 
>>> Mircea Markus
>>> Infinispan lead (www.infinispan.org)
>>> 
>>> 
>>> 
>>> 
>>> _______________________________________________
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>>> infinispan-dev at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/infinispan-dev
>> 
>> --
>> Manik Surtani
>> manik at jboss.org
>> twitter.com/maniksurtani
>> 
>> Platform Architect, JBoss Data Grid
>> http://red.ht/data-grid
>> 
>> _______________________________________________
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>> infinispan-dev at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/infinispan-dev
> 
> Cheers,
> -- 
> Mircea Markus
> Infinispan lead (www.infinispan.org)
> 
> 
> 
> 
> _______________________________________________
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> infinispan-dev at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/infinispan-dev


--
Galder Zamarreño
galder at redhat.com
twitter.com/galderz

Project Lead, Escalante
http://escalante.io

Engineer, Infinispan
http://infinispan.org